Cannulae
套管, 插管
🗣️ 情景例句
Please sit down, Mr. Mark.
请坐吧，马克先生。
The fool doesn't suspect a thing.
傻人不疑心什么。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。